Jack-gear



P. L. BILLINGSLEY'.

JACK GEAR.` APPLICATION F1151) AP11.11.1918. RENEwED sEPT.3o, 1920.

. Patented May 3, 1921*.

UNITED sTAres PATENTQFFICE.

PERCY L. BILLINGSLEY, OF ORLANDO, FLORIDA, ASSIGNOR TO ATLAS MANUFAC- TURING COMPANY, OF ORLANDO, FLORIDA.

v Patented yMayY 3, "1921.

Application led'April 11,1918, Serial A116.2225233. vRenewed September 30, 1920. Serial No. 413,894.

' LEY, a citizen of the United States, residing at Orlando, in the county of Orange and State of Florida, have invented certain new and useful Improvements in JacleGea'rs;

and I do hereby declare the following to be' a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

`This invention relates to lifting jacks which are adapted for general use but are particularly adapted for use with vehicles and particularly with motor vehicles such as automobiles. v v

The primary object of the invention is the production of an improved jack of the 4 character specified which will be economical in construction, reliable in use and not liable to break down or'become otherwise useless.

A specific object of the invention is'to provide aV jack of the character described which shall embody in its construction an improved form of gearing parts known,

especially in automobile construction, as'

full floating.

. lVith these objects in view, the invention consists in the improved construction, arrangement, and combination of parts hereinafter fully described and afterward par ticularly claimed.

In order that the construction and operation thereof may be readily comprehended, I have illustrated an approved embodiment of my invention in the accompanying drawing and will now proceed to fully and specifically describe the same with particular reference to said drawing, in which Figure 1 represents a view of the complete device in elevation, a

Fig. 2, an enlarged detail view of the lower portion of the device, in sectional elevation, taken on the plane indicated by the broken line 2 2 of Fig. 3, and

Fig. 3, a detail sectional view of the parts illustrated in Fig. 2, taken on the plane indicated by the broken line 3--3 of Fig. 2.

Like reference characters mark the same parts wherever they appear in any of the figures of the drawing.

Referring specifically to the drawing 5 indicates the base, being preferably a flat plate upon which are erected two parallel upright flanges 6 and 7, which, although *fastening bolts or shown as angle bars secured by suitable rivets 8, might, if deemed advisable, be made integral therewith.

At 9 is shown the summit or rest upon which `to support the aXle or other part to beraised, such'rest being shown as comprising two parallel plates 10, integral with and depending from the horizontal top or rest proper 11 which is 'slightly depressed in its center.

tively in vertical alinement with the corresponding upstanding plates of the base and the whole rest might be made a substantial duplicate of the base, if so desired, the essential features being a firm base with upstanding parallel plates and a rest with depending parallel plates in vertical alinementwith those of the base.

At 12 is shown a horizontal screw bar, one half the length of whichis provided with a right'hand., and the other with a left hand thread, correspondingly threaded nuts 13 and 14 being placed upon these threaded parts, and the bar being suitably shaped, as at 15, at one or both ends, to receive a wrench, crank or other turning tool.

At 16 and 17 are shown two pairs of parallel linksvor bars, pivotally connected at their upper ends to the rest 9 by means of pivot rods, preferably bolts 18 and 19, and at their other suitable pivot bars 2O and 21.

At 22 and 23 are two other pairs of parallel bars similar in form to the bars 16 and 17, and pivoted at their upper ends, by the bolts or pivot bars 20 and 21, to the nuts 13 and 14, and at their lower ends pivoted on bolts or pivotbars 24 and 25, to the upright parallel fianges 6 and 7 of the base 5. K

VThe pairs of parallel bars are suitably 'held in proper parallelism by sleeves 26 on bolts 27.

With the construction as thus far described, the turning of the screw 12 in one direction will move the nuts 13 and 14 toward each other and, by altering the angles of the parallel links with the nuts and with the base and rest, will raise the rest, while the turning of the screw in the opposite direction will reverse the operation of the parts and lower the rest.

In order to insure the exact vertical movement of the rest during these operations by maintaining the Vparallelism of the opposite pairs 16 and 23, and 17 and 22, of parallel links, I provide mechanism now to be described. 1

In devices of this character previously made, there have been integrally formed on the base and summit' ends of the links, gear teeth to engage so that the links are compelled to move at the same angles to retain the rest vertically over the base. Such constructions are open to many objections. Being integral with the links, the breakage of a gear tooth causes the replacement of the whole link. They are expensive and replace.

In order to avoid the objectionable features of the integral gears I have provided what I term iioating points for the links comprising short arms 28 and 29, alike at the base and rest ends of the links each of which has gear teeth 30 at their outer eX- tremity and a notch 31 at its inner eX- tremity.

In assembling the parts, the operation is the same at the ends of each pair of links at the base and at the rest and a description of the assembling of the parts at the lower o ends of the parallel pair of links 23, as

illustrated most clearly in Figs. 2 and3, will answer` for the rest.

The floating points 29, with a separating sleeve 32 between them, are placed between y the links 23, with their notches 31 engaging cross rods 33 in the links, and a separating sleeve 34 between. them. The bolt 25 is now passed through a base flange 7 and next through one of the links 23, then through one of the gear points 29', then through the sleeve 34, then through the other gear point 28, the other link 23 and the base flange 6, when by screwing up the nut 35 the whole structure is firmly held together but maybe readily disassembled for renewal and repair.

Should a gear tooth be broken off, it will only be necessary torenew that one gear point, which will obviously be a great economy. The gear points are duplicates of each other and can be used at any point needed.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

l. In a lifting jack, a base, lifting bars Y pivotally supported thereon and independto make ipivotally supported thereon, and independent mtermeshing gears pivoted upon the bar pivot, parallel to each bar and detachably connected to the bar at a point removed from its pivot.V

3. In a lifting jack, a base, a plurality of lifting bars pivotally mounted thereon, means for shifting said bars toward and from each other, geared members disposed upon the pivots of said bars parallel thereto and provided with' extended ends, and means for detachably connecting said ends to said bars. 7

4. Ina lifting jack, a base, a plurality of lifting bars pivotally mounted thereon, means fory shifting said bars toward and from each other, geared members disposed upon the pivots of saidk bars parallel thereto and provided with'extendedends, and means for detachably connecting said ends to said bars comprising a cross pin estending between the bars and disposed within a recess upon said ends. Y

5. In a lifting jack, a base provided with opposite standards, pivot bolts extending between said standards, lifting bars pivotally mounted upon said bolts, intermeshing gear members pivotally mounted upon said bolts and provided with recessed free ends, and means engaging said recess to retain said gear members.

6. In a lifting jack a base provided with opposite standards, pivot bolts extending between said standards, lifting bars pivotally mounted upon said bolts, intermeshing gear members pivotallymounted upon said bolts and provided with recessed free ends, a cross pin extendinglbetween said bars and throughV the recess in said free end, and a sleeve disposedlbetween said gear members.

In testimony whereof I have signed'my name to this specification in the presence of two subscribingwitnesses.

yPE1-iov L. BILLINGsnEY. Witnesses H. M Voonms, HAZEL M. HOVERMALE. 

